Casting machine



Oct. 22, I929. 1. D. TRAVIS 1,732,443

CASTING MACHINE Filed Aug. 13, 1927 2 Sheets-Sheet 1 gnaw/14 600 Ira D //"a V/ 5 if. moymw.

abtmmq Oct. 22, 1929.

CASTING MACHINE Filed Aug. 13, 1927 2 Sheets-Sheet 2 gwmmto'a abtouwq I. D. TRAVIS 1,732,448 I Patented Oct. 22, 1929 PATENT OFFICE IRA D. TRAVIS, F SALT LAKE CITY, UTAH CASTING MACHINE Application filed August 13, 1927.

My invention relates to casting machines and has for itsobject to provide a new brake shoe casting machine which will cast and automatically extract the shoe quickly with the use of molds, one of which is stationary and the other movable by fluid pressure.

A further object is to provide a casting machine for casting brake shoes which will cast and eliminate any number of shoes at one pouring, the number varying with the different type of mold used.

A still further object is to provide a brake shoe casting machine which will be economical in construction and operation and which 1 will simplify the casting, eliminating the present day practice of forming the mold in sand.

These objects I accomplish with the de vice illustrated in the accompanying draw- 20 ings, in which similar numerals and letters of reference indicate like parts throughout the several views and as described in the specification forming a part of this application and pointed out in the appended claims.

In the drawings, in which I have shown the best and most preferred manner of building my invention, Figure 1 is a side elevation of the machine with the molds separated. Figure 2 is a plan view of the same. Figure e 3 is a side view of the machine with the molds together for pouring. Figure 4 is a front face view of one of the molds showing the location of the different brake shoe molds, parts cut away. Figure 5 is a front face view of the other mold showing the parts thereon which fit into the mold shown in Figure 4,

parts cut away. Figure 6 is a side view of the elements of the movable mold used to force the casting from the mold after it has been poured and cooled sufliciently. Figure 7 is an end view of the same.

In the drawings I have shown the frame upon which my machine is mounted as A, with the fluid operating cylinder as B, and

the two separate molds as C and D. A piston rod E connects the back side of the mold D with the fluid cylinder by which it is moved to and from the mold C. Both of the said molds are provided with support blocks 1 and 5 2 on each side thereof, by which they are sup- Serial No. 212,655.

ported on the frame A and on which the mold D is longitudinally movable along the top side of the said frame A. The said mold I) is the male mold and the mold C is the female, with the protruding portions of the male fitting into like shaped excavations in the female. The said male mold D is made as shown in Figure 5, with a protruding memher 3 formed on the front side thereof adapted to fit into and partially fill a similarly shaped excavation 3 in the mold C, as shown in Figure 4. The shape of the casting to be made will vary but the protruding portion on the mold D will be present in all cases, making the front side of the mold with one 5 or more members protruding therefrom, depending on the number of castings to be made with the one mold. The half of the individual mold cavity 5 is made as usual in the mold D and the other half is made in the mold C except that the top side of the form is not made in the mold C but is in the moldD and the top thereof is the bottom side 3* of the protrusion 3 so that when the two molds are together the most of the casting is surrounded by the mold D with only one side, half of the ends and half of the bottom formed in the mold C. This construction of the molds makes the casting produced therein more easily extracted from the mold, and, in order to make my machine automatic in its action, I provide two spaced apart extractors 6 and 7 operated by the backward movement of the mold D. The said extractors 6 and 7 are made, as shown in Figure 6, with a head por- 35 tion 8 formed to fit into an exactly similar mortised hole 9 formed in the back side of the said mold C so that when the head portion 8 is in the hole 9 the inner surface ofthe mold is smooth without any protruding members thereon. The sides of the hole 9 and the head 8 are tapered to prevent binding of the head in the hole 9. The said extractors 6 and 7 are connected with the mold D by a rod 10 secured on one side thereof outside of the area used for surface of the mold and a nut 11 is provided on the end thereof so that when the mold D is moved backwardly it comes into contact with the nut 11 and moves the extrac' torsas it continues to its full length movement. The said extractors 6 and 7 are guided in the mold C by two spaced apart rods 12 and 13 attached to the back side of the head portion 8 so that when the mold D is moving either away from or approaching the mold C the portions 8 are always in alinement with the holes 9 and will fit therein when brought into contact, therewith. Each head is provided with two guide rods and, as shown in the drawings for this type of casting, there will be two extractors to each castingsothat both ends of the casting are removed simultaneously from the mold and allowed to fall therefrom. When the mold D isbrought into contact with the mold C, the front side 15 of the member 3 comes into contact with the upper edge of the head 8 and thereby forces the head into the hole 9, placing the molds in instantaneous readiness for pouring. .I-Ioles 16 and 17 are bored through the molds C and D through which the rods 10, 12 and 18 pass respectivelyto guide and control themovement of the head 8 of the extractors 6 and 7. The molds, as shown in. Figures 4 and 5 of the drawing, are provided. with a central pouring hole 18 therein and with laterals 19 formed therein to conduct the molten metal to the separate molds.

The mold being shown in Figures 1, 2 and 3 ofthe drawings are for two castings only, but it will be obvious that such a construction as that shown in Figures 4 and 5 will be the desired type for use in large foundries where many castings are made and such modifications and changes in the device may be made without departing from the scope of the claims. H

The mold D is so constructed that the entire friction surface of the brake shoe to be cast will not have a seam therein but will sion in the movable mold, said protrusion adapted to fit into said depression in said movable mold to partially fill it and to form the rest of a form for casting with the majority of the form in the movable mold; and spaced apart extractors carried between said molds adapted to be actuated by the movable mold and to force the finished casting from the form in said stationary mold.

3. In a casting machine the combination of two spaced apart molds, one of which has depressions therein and the other of which has a protrusion thereon adapted to fit into and partially fill said depression, with the form for the casting made in the two molds but with the greater majority thereof in the mold having the protrusion thereon; means to move one mold to and from the other mold; and extractors carried in the movable mold section to draw the finished casting from the other mold section.

In testimony whereof I have ailixed my signature.

IRA D. TRAVIS.

be smooth, which will provide a much better from said stationary mold, by a piston rod operated by said cylinder a protrusion on said movable mold; a depression in said stationary mold adapted to be partially filled by said protrusion on the movable mold with the rest'of the space hollow to be filled by molten metal to form a casting; and extractors in said stationary mold adapted to be moved by said movable mold and to force the finished casting from the stationary mold.

2. In a. casting machine the combination of-two molds, onestationary and the other movable, with a depression in the stationary mold and a depression formand a protru- 

